Google’s bugfinders found yet another bug in LastPass

For most of us, Saturday morning is a time for a lie in, a leisurely brunch, or maybe taking the kids to the park. But for some it’s bug-hunting time.

Tavis Ormandy, a member of Google’s crack Project Zero security team, was in the shower and thinking about LastPass – after finding a number of flaws in the password manager over the past week. Then he had an epiphany and “realized how to get codeexec in LastPass 4.1.43,” he said, and filed a bug report.

OK, exploit working and full report sent to LastPass. Now time to put some pants on. 👖

The timing couldn’t have been worse for LastPass engineers. They spent last weekend sorting out Tavis’ other bug finds, and now it looked like they’d be back in the office again this weekend. LastPass has now confirmed that the new find is an issue and they are working on it.

“This attack is unique and highly sophisticated. We don’t want to disclose anything specific about the vulnerability or our fix that could reveal anything to less sophisticated but nefarious parties. So you can expect a more detailed post mortem once this work is complete,” the firm said.

“We want to thank people like Tavis who help us raise the bar for online security with LastPass, and work with our teams to continue to make LastPass the most secure password manager on the market.”

That last statement is a kicker, because some on Twitter got very upset at Ormandy for disclosing that there was an issue with LastPass. It seems some people prefer to think that ignorance is bliss.

Ethicist have built a documented process >20 yrs for this & it doesn't start with a tweet. All that does is cause fear, uncertainty and +ego

It seems a fair few people don’t understand the rules of responsible disclosure. Researchers are perfectly free to go public by saying there is a flaw in a particular piece of code, so long as they don’t say exactly what it is or how to exploit it before a patch is available.

William Fieldhouse

I currently work full time as a penetration tester and have been involved within the IT security industry for over a decade. I also love to pioneer any forms of new technology and ideologies for future advancements. Feel free to contact me at [email protected]

Related

William Fieldhouse

I currently work full time as a penetration tester and have been involved within the IT security industry for over a decade. I also love to pioneer any forms of new technology and ideologies for future advancements. Feel free to contact me at [email protected]